id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 23761 Mysql validator crashes with None db_type return. - Backport of master fix to 1.7 Adam DePue Tim Graham "When implementing a custom field type with a db_type() method that returns None, on Django 1.6 and below we would signify not to create a column at all. With Django 1.7, this causes a crash with the mysql backend. The issue is already fixed in master and this simply backports the safety check. A fix was made in August in master: https://github.com/django/django/commit/e9103402c0fa873aea58a6a11dba510cd308cb84#diff-14 The fix contains a lot more than is needed for this specific issue, however the specific changes to django/db/backends/mysql/validation.py would be great to have in Django 1.7. This worked fine in < Django 1.7 and works fine in upstream." Bug closed Core (System checks) 1.7 Release blocker fixed mysql db_type Accepted 1 0 0 0 0 0